If you drive a high-performance BMW, especially one with an N54, N55, or S55 engine, the crank hub is one of the most important components to evaluate. These engines are known for potential hub slip under high RPM and high load shifting, which can throw off engine timing and cause serious internal damage.
Upgrading to a spline lock style crank hub is one of the most effective ways to address this weakness. Here’s when it makes sense to make the switch.
You Push Your Vehicle to the Limit
If your BMW sees regular track use or you frequently take it to redline, the stock crank hub can slip under the extreme load and rapid gear changes. This results in timing drift, misfires, and, in severe cases, valve contact.
If your vehicle has an S55 engine, an upgraded BMW S55 crank hub uses a positive mechanical engagement that locks the crankshaft and timing components together, allowing you to safely drive at higher RPM without worrying about slippage or repeat re-timing.
If You Install a New Aftermarket Turbocharger
If you’re already adding an aftermarket turbocharger, it’s the perfect time to replace the crank hub. You’ll avoid some duplicate labor, and the stronger hub will ensure your new power levels do not create reliability problems downstream.
Even on street-driven cars, combining an S55 crank hub upgrade with turbo or fueling modifications ensures that added torque is transmitted without risk of crank hub slip.
You’ve Acquired a Pre-Owned, High-Performance BMW
If you recently picked up a pre-owned BMW with an N54, N55, or S55 engine, upgrading the crank hub is a smart first step, even if the car came with good maintenance records. It is inexpensive insurance against unknown driving history or past tuning abuse.
A new spline lock style BMW crank hub removes doubt and gives you a fresh baseline for reliability, whether your car’s next outing is on the road or at the track.
About Vargas Turbocharger Technologies
Looking for more horsepower, reliability, and protection from your BMW? VTT™ offers everything from OEM turbos to fully engineered single- and twin-turbo kits (and all the supporting goodies you need), all backed by real testing and proven results. You’ll even find solutions beyond power, like the VTT™ OBD lock tool to protect your build. If you’re ready to move past stock limitations, VTT™ is the name you want under the hood.
Get an S55 crank hub upgrade and many other upgrades at https://vargasturbo.com/
Original Source: https://bit.ly/47dyk2c
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